Just bought a Canon Pixma Pro 1, followed the instructions to the letter but after installing the printhead an orange led is flashing, indicating that the printhead is not correctly in place. I opened the top again but the printhead only moves halfway into to opening - making it impossible to access. It holds this halfway position for about 10 seconds and then moves back inside the printer. I've restarted the printer several times with same outcome. It sounds like the printer is struckling to push the head out into position, before giving up and returning...